Application Guide

Section 5876 Installation Instructions
Issue AT, April 26, 2013 Spec. No. 582140000 (Models 802
NLDB, 802NLEB and 802NL-B)
Page 5-26 Chapter 5. Installing the Rectifiers and Initially Starting the System
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between terminals 7 and 8 of TB1 located on the MCA circuit card before applying the
Remote High Voltage Shutdown or Rectifier Emergency Shutdown loop closure signal.
Removal of the Test loop closure signal enables normal operation of the Remote High
Voltage Shutdown and Rectifier Emergency Shutdown circuits.
Procedure
1) With SYSTEM OK being displayed on the MCA Interface Pad, press and release
the FUNCTION SET ENTER key.
2) Repeatedly press and release the FUNCTION SELECT DOWN arrow key until
VERIFY TEST, ESTOP,& HVS INPUTS is displayed.
3) Apply the Test loop closure.
a) Requirement: Verify MCA displays TEST SHUTDOWN INPUT IS ON.
4) With the Test loop closure still applied, apply the Emergency Stop loop closure.
a) Requirement: Verify MCA displays EMERGENCY STOP INPUT IS ON.
5) Release the Emergency Stop loop closure.
6) With the Test loop closure still applied, apply the High Voltage Shutdown loop
closure.
a) Requirement: Verify MCA displays HI VOLTAGE SHUTDOWN INPUT IS
ON.
7) Release the High Voltage Shutdown loop closure.
8) Release the Test loop closure.
9) Press and release the FUNCTION SET YES (+) and NO (-) keys simultaneously,
to return to the beginning of the MCA menu tree.
Checking Remote High Voltage Shutdown
Caution: This procedure may interrupt power to the load. Perform this test only
during system initial startup and checkout, or when a load is not
connected to the system.
Procedure
1) Apply and remove a remote high voltage shutdown signal to the system.
a) Requirement: The high voltage shutdown circuit on all Rectifiers activates
to shut down the Rectifiers. After approximately four seconds, the restart
circuit is automatically activated to restore Rectifier operation.
b) Requirement: All Rectifier "FAIL” indicators go red while the Rectifiers are
shut down.
c) Requirement: MCA “MAJOR” indicator flashes red while the Rectifiers are
shut down, if battery is connected to the system.
d) Requirement: MCA displays HI VOLTAGE SHUTDOWN INPUT ACTIVE
and ### PCUs HAVE FAILED while the Rectifiers are shut down, if battery is
connected to the system.
e) Requirement: External alarms activate (if configured) while the Rectifiers
are shut down.